ASTROSAT CZTI

Data Quality Report

Orbit 20180816_A04_037T01_9000002312_level2

Creation date: 2025-11-24T03:12:45.233722
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A04_037T01_9000002312cztM0_level2.fits modeM0/AS1A04_037T01_9000002312cztM0_level2_quad_clean.evt
Size (bytes)684,293,760519,598,080
Size652.6 MB 495.5 MB
Events in quadrant A4,193,2982,848,073
Events in quadrant B4,011,4882,866,530
Events in quadrant C4,093,8022,704,188
Events in quadrant D3,641,8902,531,733

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014180
B014180
C014180
D014180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01507260
B01525660
C01513850
D01466980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6976911341.625364%
B697699821.407502%
C6976912721.823159%
D697697401.060643%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 81254 69755 0 0 0.00% 0.00%
B 81254 69760 0 0 0.00% 0.00%
C 81254 69758 0 0 0.00% 0.00%
D 81254 69758 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 3982 11.06 1091 1023 267.5
A 7 110 3295 8.49 1091 1023 267.5
A 9 19 3174 8.04 1091 1023 267.5
B 2 9 3366 11.46 1057 1008 205.7
B 2 8 2761 8.52 1057 1008 205.7
B 3 17 2715 8.3 1057 1008 205.7
C 12 241 2858 6.68 1081 1008 277.0
C 3 126 2698 6.1 1081 1008 277.0
C 9 233 2679 6.03 1081 1008 277.0
D 6 231 2600 6.03 1039 947 274.1
D 3 14 2591 6.0 1039 947 274.1
D 10 189 2572 5.93 1039 947 274.1

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter